Western Digital WDG1U3200 My Book Essential Edition 320 GB USB 2.0 External Hard Drive Store and back up your music, photos, videos and important documents with this external hard drive Easy to set up and use with built-in installation software Simple user interface features USB 2.0 connectivity Device holds up to 320 GB of data Measures 5.55 x 2.25 x 6.71 inches (WxHxD)